// SPDX-License-Identifier: GPL-2.1-or-later
/*
 * Copyright (C) 2009-2012 Cyril Hrubis <metan@ucw.cz>
 */

 /*

   Simple loaders example utilizing progress callback.

  */

#include <stdio.h>
#include <string.h>
#include <errno.h>

#include <gfxprim.h>

struct callback_priv {
        char *op;
        char *name;
};

static int progress_callback(gp_progress_cb *self)
{
        struct callback_priv *priv = self->priv;

        printf("\r%s '%s' %3.1f%%", priv->op, priv->name, self->percentage);
        fflush(stdout);

        /*
         * It's important to return zero as non-zero return value
         * aborts the operation.
         */
        return 0;
}

int main(int argc, char *argv[])
{
        gp_pixmap *img;
        struct callback_priv priv;
        gp_progress_cb callback = {.callback = progress_callback,
                                   .priv = &priv};

        if (argc != 2) {
                fprintf(stderr, "Takes an image as an parameter\n");
                return 1;
        }

        priv.op   = "Loading";
        priv.name = argv[1];

        img = gp_load_image(argv[1], &callback);

        if (img == NULL) {
                fprintf(stderr, "Failed to load image '%s':%s\n", argv[1],
                        strerror(errno));
                return 1;
        }

        printf("\n");


        priv.op   = "Saving";
        priv.name = "out.png";

        if (gp_save_png(img, "out.png", &callback)) {
                fprintf(stderr, "Failed to save image %s", strerror(errno));
                return 1;
        }

        printf("\n");

        return 0;
}